Combination burner



/ I Dec. 28, 1937.

J. 5. ZINK i 2,103,605

COMBINATION BURNER Filed Jan. 11, 1957 2 Sheets-Sheet 1 I 3mm.

, Dec. 28, 193-7. I J. 5. ZlNK I COMBINATION BURNER 2 Sheets-Sheet 2 'Filed Jan. 11, 1937 Patented Dec. 28, 1937 2,103,605 COMBINATION BURNER Johns. Zinlr, Tulsa, Okla... Application January 11, 1937, Serial No.'120,073

7 Claims. (o1. 158- -1 1) This invention relates to burners and more particularly to combination oil and gas burners for use in heating stills, boilers and other industrial furnaces.

5 A principal object of this invention is to provide a highly efllcient combination oil and gas burner, wherein either the oil or gas burner may be removed from the combination asembly without disturbing the operation of the remaining 10 burner, without requiring the dismantling of the main burner housing or supporting structure and without requiring alteration or dismantling of auxiliary appliances such as registers for admission and control of air for combustion.

I5 Another object of this invention is to provide a combination burner having the above advan-' tages and which, at the same time, will be cheaper to construct and simpler to operate.

The present invention is for improvements 20 in the combination burner described in my copending application, Serial Number 108,101, filed October 28, 1936, and the present application is a continuation-in-part of the former application.

Other objects and advantages of my new burner will become apparent from the following description when read in conjunction with the accompany drawings which illustrate several forms of my new invention.

30 Fig. 1 is a horizontal median view, partly in section, of a complete burner assembly in accordance with this invention.

Fig. 2 is a fragmental view taken along line- A-A of Fig. 1. 35 Fig. 3 is an elevationcf the outside end of the burner assembly.

Fig. 4 is an elevation of. the furnace end of the burner assembly.

Fig. 5 is a horizontal median view, partly in 40 section, of another modification of a burner assembly in accordance with thisinvention. Fig. 6 is a detail of the gas burner head. Referring to the drawings, the burner assembly comprises a cover or mounting plate 5 hav- 45 ing a central opening 6 surrounded by a-collar 1. An elongated support tube or conduit .8 extends through opening 6 and is slidable in col lar I which acts as a bearing for conduit 8, -A second elongated conduit 8, of smaller diam 5' eter than conduit '8, is supported longitudinally of and substantially within the center of conduit 8 by means of spacer plates in and II which depend inwardly from the. top. of conduit 8 parallel to the axis thereof and are rigidly connect- 6 ed to the outside of conduit, 8, which is somewhat longerv than conduit 8 and extends beyond each end thereof. By this arrangement of conduits 8' and 9, an annular-space 8a is provided between the innerwall of conduit 8 and the outside of conduit 9. Anoil burner of the type well known in the burner art and consisting of a steam pipe l2 enclosing an oil pipe 13 joined together at the burner end to form a burner head l4 having fuel emission ports a, is slidably mounted within conduit 9 so that burner head 10 I4 extends beyond the end of conduit 8 and is adjustable horizontally with respect thereto. At the end opposite the burner head ,aclosure is effected between steam pipe l2 and oil pipe 13 by meansof a collar l5 mounted on the end- 15 of pipe I 2 and a bushing l6 surrounding pipe l3 and which screws into collar 15; Steam and oil supply pipes I! and I8 respectively are connected to their respective burner pipes l2 and V I3 and are so arranged as to connect therewith 2 in the same vertical plane as spacer plates I0 and II. That is, spacerplates I l) and II; steam supply pipe I! and oil supply pipe l8 are all in the same vertical plane at right angles to the horizontal axis of conduits 8 and 9;

'I'he gas burner consists of a hollow'torusshaped burner head l9'having a series'of gas emission jets 28 arranged on the front surface thereof for emission of gaseous fuel from a hollow annular gas supply chamber25 within head 30 IS. The outside diameter of head I 8 is slightly less than the inside diameter of conduit v8 which permits head Hi to be slidablyinserted through conduit 8. The central opening 2| in head I9 is of slightly larger diameter than the outside diameter of conduit 9 therebyp'ermitting head iii to slide over conduit 8 while being inserted into conduit 8 through annular spaceadi-Head I9 is split atone point in the circumference thereof to provide a slot 22 parallel to the lon- 40 I gitudinal axis of head 19 which permits 7head iii to pass by steam and oil supply pipes l1 and I8 respectively and spacer plates Ill and II.

-when being inserted through annular space 8a,

to its operating position which, longitudinally, is between the furnace end-of conduit 8 and the furnace end of conduit 9. Conduit 9 acts as a support for head IS. A pair of gas supply pipes 23 and 24 are connected to the back of head l9 at opposite sides of slot 22'and communicate 60 with chamber 25. By this arrangement, eachof the pipes is'at one side of the plane of pipes I 1 and I8, plates I 8 and H andwill be out of contact with these members when being inserted or removed from the assembly. Pipes 23 and 24 are of such size as to be freely insertable through annular space 8a.

By the arrangement of the parts as above described, it will be clearly evident that the oil and gas burning portions of the combination burner are entirely independent of each other and may be separately removed from the combination assembly or replaced therein without interference with each other.

In a commercial combination burner of the type described, conduit 8 is a length of standard six inch pipe, about 24 inches long. Conduit 9 is 2 inch standard pipe 30 inches long, pipe 12 is 1%, inch standard pipe, pipes l3, l1 and I8 are inch standard pipe and pipes 23 and 24 are 4 inch standard pipe. Plate 5 is about 28 to 30 inches in diameter.

It will be noted that the oil and gas burning portions of the combination burner are supported independently of each other; the oil burner being supported within conduit 9 and head 19 of the gas burner on the outside of conduit 9. Thus removal of the oil burner will not leave the gas burner unsupported.

It will also be evident that, by the above arrangement, both the oil and gas burners are confined within the relatively small central area of conduit 8 and in this arrangement form a compact assembly. As a result, the assembly may be simply and cheaply constructed and will be simple to operate. The compact arrangement of the gas and oil burner heads provides a relatively small area for generation of combustion gases and very efficient mixing of both fuels will take place particularly when both burners are in operation at the same time. A high efficiency burner results therefrom.

The burner assembly may be mounted in a furnace opening by bolting plate 5 to the furnace wall, or the assembly may be spaced from the furnace wall by providing a throat ring 28 which is bolted to the furnace wall and by connecting plate 5 to ring 26 by means of bolts 21 which pass through spacer sleeves 28, the length of which determines the distance which plate 5 is spaced from ring 26.

Fig. 5 illustrates another modification of my new burner, wherein head I9 is mounted on conduit 9 but at the outer end of the assembly rather than at the furnace end as in the above described modification, and is spaced from the outer end of conduit 8 by a space 38. A series of parallel nozzles 29 mounted in the forward face of head l9 communicate with chamber 25 and extend into space 8a. A circular diffuser plate 3! is mounted on the furnace end of conduit 9 and at an angle of about 60 with respect to the longitudinal axis of conduit 9. the slope of the angle being toward the furnace end of the burner and providing an annular orifice 32 between the end of conduit 8 and diffuser plate 3|. Helical vanes 33 are mounted at right angles to the orifice face of plate 3| and radiate from the center to the outer edge thereof. The oil burner portion of this modification is substantially the same as in the previously described modification and gas burner head [9 is slotted in the manner previously described to permit of its withdrawal past spacer plates I8 and II and steam and oil supply pipes I1 and i8 respectively. The relative arrangement of conduits 8 and 9 in this modification is the same as in the previously described modification.

In the operation of this modification, when the gas burner is in use, gas discharging through nozzles 28 will mix with air entering space 8a.

from space 30 between head l9 and the outside end of conduit 8. The resulting pre-mixed air and gas then flows through annular space 8a and is further mixed and given a swirling motion by means of the vanes 33 on diffuser plate 3| as the mixture is discharged from orifice 32 where the mixture is commingled with additional air from the outside of conduit 8 where combustion takes place.

The operation of the oil burner portions of both modifications is well known and understood by those skilled in the art. In both modifications, the gas and oil burners may be operated at the same time or separately and either burner may be removed from the assembly or replaced therein without adversely affecting the operation of the remaining burner.

In the form of burner illustrated in the drawings, a louvre type air register, as shown in Figs. 1 to 4, may be used to regulate the volume and direction of the air admitted for combustion of the fuels used. As illustrated, the register comprises a plate 34 having a central opening 35 surrounded by a collar 38 extending at right angles to plate 34. The opening 35 and collar 36 form a hub for slidably mounting plate 34 in a vertical position on conduit 8. A series of louvrcs 31, mounted on shafts 38 set in a circle about the outer edge of plate 34, extend horizontally from the plate 34 toward the furnace end of the burner. Shafts 38 extend through plate 34 and individual bearing bosses 39 and each shaft 38 is connected to one end of one of a series of cranks 48. The other end of each of the cranks 40 is connected by means of pins 4! to a crank ring 42, rotation of which will radially adjust louvrcs 31 by the action of cranks 40. The change in the relative positions of louvres 31 will be regulated by the-arc through which ring 42 is turned.

A pair of shafts 43 and 44 extend through suitable openings in plate 5 and registering openings in plate 34. Handles 45 and 46 are rigidly mounted on the ends of respective shafts 43 and 44 which extend outside of plate 5. The opposite ends of shafts 43 and 44 which extend through plate 34 are threaded and are held against withdrawal from plate 34 by means of suitable nuts 41 and 48, respectively, on the furnace side of plate 34. Mounted on shafts 43 and 44 on the outside of plate 34 are hold-down nuts 48 and 50 respectively. Nuts 41 and 49 and nuts 48 and 50 cooperate with their respective openings in plate 34 to form bearings within which shafts 43 and 44 may rotate while preventing longitudinal movement ofthe shafts relative to plate 34. A

lever arm 5| is rigidly mounted on one of the shafts, in this case shaft 43, and is connected by means of a link 52 to crank ring 42. Rotation of shaft 43 by means of handle 45 will act through arm 5| and link52 to rotate ring 42 and thereby change the radial position of louvres 31. By means of handles 45 and 46 and shafts 43 and 44, the register may be moved horizontally along conduit 8 to any desired position so as to vary the opening between plate 34 and throat ring 26. At the same time, rotation of shaft 43 by handle 45 will permit any desired setting of the louvres 31. When plate 34 and louvres 31 are set as desired, they may be fixed in the positions so set by the tightening of a set screw 53 which extends through a bearing boss 54 which is mounted on the outside of plate 5 and surrounding shaft 43. Registering peep-holes 55 are provided in plates 5 and 34, the one in plate 5 being covered by a cover plate 56.

' for providing independent supports for the oil and gas burners, other type of individual supports may be used. For example, the gas burner may be supported by placing pipes 23 and 24 on brackets extending horizontally from the sides of conduit 8 while the oil burner may be suspended in the center of conduit 8 by means such as hooks depending from the inner top wall of conduit 8. Slot 22 in head l9 may be altered or adjusted to permit removal of the gas burner without interfering with the oil burner and the supports for the oil burner so arranged that it may also be withdrawn from the assembly or replaced therein without interfering with the gas burner.

It will be obvious to those skilled in the art that various changes may be made in the details of construction and in the arrangement of the several parts without departing from the principal features of the invention as herein set forth.

What I claim and desire to secure by Letters Patent is:

1. A combination oil and gas burner assembly comprising an outer tubular member, an inner tubular member extending through the outer tubular member and spaced from the latter by a substantially annular passageway, supporting means for the inner member secured to the outer member, pipes having portions extending through and projecting from the inner member, an oil burner head secured to the projecting ends of said pipes, a substantially annular gas burner head substantially surrounding said inner memberand having a slot to permit of its passage by said supportingmeans and by portions of said pipes, and

gas conveying conduit means connected to the gas burner head, said gas burner head and gas conveying conduit means being removable from the assembly while the oil burner head and said pipes are in operation without' disturbing the latter, and said pipes and oil burner head being removable from the assembly while thegas burner is in operation without disturbing the latter.

2. A combination oil and gas burner assembly comprising a supporting plate, an outer tubular member extending through the plate and supported thereby, an inner tubular member extending through the outer tubular member and spaced from the latter by a substantially annular passageway, supporting means for the inner member secured to the outer member, pipes having portions extending through and projecting from the inner member, an oil burner head secured to the projecting ends of said pipes, a substantially annular gas' burner head substantially surrounding said inner member and having a-slot to permit of its passage by said supporting means and by portions of said pipes, and gas conveying conduit means connected to the gas burner head, said gas burner head and gas conveying conduit means being removable from the assembly while the oil burner head and said pipes are in operation without disturbing the latter, and said pipes and oil burnerhead being removable from the assembly while the gas burner is in operation without disturbing the latter.

3. A combination oil and gas burner assembly comprising a throat ring, a supporting plate spaced fromthe ring, means rigidly connecting the ring and plate for supporting the plate from the ring, an outer tubular member extending through the plate and supported thereby, an inner tubular member extending through the outer tubular member and spaced from the latter by a substantially annular passageway, supporting head and gas conveying conduit means being re-- movable from the assembly while the oil burner head and said pipes are in operation without disturbing the latter, and said pipes and oil burner head being removable from the assembly while the gas burner is in operation without disturbing the latter.

4. A combination oil and gas burner assembly comprising an outer tubular member, an inner tubular member extending through the outer tubular member and spaced from the latter by a substantially annular paassageway, supporting means for the inner member secured to the outer member, pipes having portions extending through and projecting from the inner member, an oil burner head secured to the projecting ends of said pipes, a. substantially annular gas burner head substantially surrounding said inner member and having a slot to permit of its passage by gas conveying conduit means being removable from the assembly while the oil burner head and said pipes are in operation without disturbing the latter, and said pipes and oil burner head being removable from the assembly while the gas burner is in operation without disturbing the latter, and air controlling means surrounding the outer tubular member for controlling combustion air passing toward said oil burner.

5. A combination oil and gas burner assembly comprising a supporting plate; an outer tubular member extending through said plate, an inner tubular member extending centrally through the outer tubular member and spaced from the latter by a substantially annular passageway, supporting means for the inner member secured to the outer member, pipes having portions extending through the inner member and projecting from the inner member, an oil burner head secured to the projecting ends of said pipes, a substantially annular gas, burner head substantially surrounding said inner member and arranged in close proximity to said oil burner head, said gas burner head having a slot to permit its passage. by said supporting means-and by-portions of said pipes, and gas conveying conduits connected to said gas burner head and extending through said passageway at opposite sides of the inner tubular member, said gas burner head and gas conveying conduits being removable from the assembly while the oil burner head and said pipes are in operation without disturbing the. latter, and said pipes and oil burner head being removable from the assembly whilethe gas burner is in operation without disturbing the latter.

6. A combination oil and gas burner assembly comprising an outer tubular member, an inner tubular member extending centrally through the outer tubular member and spaced from the latter by a substantially annular passageway,'means for supporting said inner member from the outer member and including an element arranged substantially radially within said passageway, pipes having portions extending through the inner member and projecting from the latter, an oil burner head secured to the projecting ends of said pipes, a substantially annular gas burner head substantially surrounding said inner member and having a slot to permit of its passage by said supporting means and by portions of said pipes, and gas conveying conduit means connected to the gas burner head, said gas burner head and gas conveying conduit means being removable from the assembly while the oil burner head and said pipes are in operation without disturbing the latter, and said pipes and oil burner head being removable from the assembly whilethe gas burner is in operation without disturbing the latter.

7. A combination oil and gas burner assembly comprising an outer tubular member, an inner tubular member extending through the outer tubular member and spaced from the latter by a substantially annular passageway, supporting means for the inner member secured to the outer member, oil conducting means having a portion extending through and projecting from the inner member, an oil burner head secured to the projecting end of said oil conducting means, a substantially annular gas burner head substantially surrounding said inner member and shaped to permit of its passage by said supporting means and by a portion of said oil conducting means, and gas conveying conduit means connected to the gas burner head, said gas burner head and gas conveying conduit means being removable from the assembly while the oil burner head and said oil conducting means are in operation without disturbing the latter, and said oil conducting means and oil burner head being removable from the assembly while the gas burner is in operation without disturbing the latter.

JOHN S. ZINK. 

